{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BU9889GUL-WE2","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BU9889GUL-WE2","canonicalUrl":"https://icboms.com/rohm/BU9889GUL-WE2","factsUrl":"https://icboms.com/api/mcp/products/BU9889GUL-WE2","rawCanonicalId":null},"summary":{"shortDescription":"ROHM BU9889GUL-WE2, EEPROM, 8Kbit, I²C, 400 kHz, 1.7V-5.5V, -40°C to 85°C, VCSP50L1 package, Tape & Reel.","salesMarkdown":"## 8 Kbit I²C EEPROM in a 6-ball VCSP50L1 package The ROHM BU9889GUL-WE2 is an 8 Kbit serial EEPROM with an I²C interface, organized as 1 K x 8 bits. The 400 kHz clock frequency matches the standard I²C fast-mode bus speed used by most microcontrollers. Data is non-volatile, with a 5 ms write cycle time per word or page. Typical applications include parameter storage, calibration data, and configuration registers in industrial sensors, telecom modules, and automotive cabin electronics. ## Supply range and 1.8 V system compatibility The 1.7 V minimum supply voltage directly answers the 1.8 V system compatibility question. This EEPROM can be powered from a 1.8 V rail with margin, so it fits low-voltage MCU designs without a separate level translator on the I²C bus. The 5.5 V upper limit also covers legacy 5 V buses, giving the BOM engineer one part number for mixed-voltage boards. ## Package and footprint — VCSP50L1 The 6-UFBGA / CSPBGA package (supplier device package VCSP50L1) is a 0.5 mm pitch, 6-ball array. The small footprint saves board area but requires careful PCB layout: the solder-mask-defined pads need a stencil aperture matched to the ball diameter, and the reflow profile must follow the JEDEC MSL level for this package. ## Lifecycle and compliance It is ROHS3 compliant, meeting the current EU restriction on hazardous substances.","metaTitle":"BU9889GUL-WE2 EEPROM 8Kbit I²C VCSP50L1, 400 kHz","metaDescription":"BU9889GUL-WE2 EEPROM 8Kbit I²C 400 kHz, 1.7V-5.5V, -40°C to 85°C, VCSP50L1 package. Active lifecycle, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Technology":"EEPROM","Memory Size":"8Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Surface Mount","Package / Case":"6-UFBGA, CSPBGA","Clock Frequency":"400 kHz","lifecycle_stage":"eol_hot","Memory Interface":"I²C","Voltage - Supply":"1.7V ~ 5.5V","Memory Organization":"1K x 8","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"VCSP50L1","Write Cycle Time - Word, Page":"5ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.62","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.56300","currency":"USD"},{"qty":25,"price":"$0.55640","currency":"USD"},{"qty":50,"price":"$0.55300","currency":"USD"},{"qty":100,"price":"$0.49460","currency":"USD"},{"qty":250,"price":"$0.49036","currency":"USD"},{"qty":500,"price":"$0.48312","currency":"USD"},{"qty":1000,"price":"$0.46584","currency":"USD"},{"qty":3000,"price":"$0.43852","currency":"USD"},{"qty":6000,"price":"$0.42430","currency":"USD"},{"qty":15000,"price":"$0.41036","currency":"USD"},{"qty":30000,"price":"$0.39450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ae6e7b55e85f2887691a02e5525bb075.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BU9889GUL-WE2 RoHS compliant?","answer":"Yes, the BU9889GUL-WE2 is listed as ROHS3 compliant, meeting the current EU RoHS directive."},{"question":"Are there equivalents for BU9889GUL-WE2?","answer":"The closest functional peer is the BR24T16FVM-WTR, a 16 Kbit I²C EEPROM from the same ROHM family with the same 400 kHz speed, 1.6 V minimum supply, and 5 ms write cycle. The BU9889GUL-WE2 is 8 Kbit, so the BR24T16 offers double the density in a similar footprint — verify pin compatibility before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BU9889GUL-WE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BU9889GUL-WE2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}